herf waveguide / Electromagnetic Radiation / Forums

Forums

4hv.org :: Forums :: Electromagnetic Radiation

« Previous topic | Next topic »

herf waveguide

1 2 next

Move Thread

LAN_403

lokeycmos

Tue Dec 22 2009, 04:00PM

Registered Member #2553 Joined: Fri Dec 18 2009, 01:36PM
Location: St Cloud Minnesota
Posts: 97

hello, im somewhat new to the herf. i have several magnetrons laying around. im looking to do some cool plasma experiments with a herf. i really cant find much online about this topic. first off im wondering if anyone knows what the angle of spread is when the microwaves come out of the tip of the magnetron? and secondly im looking for some advice about focusing the microwaves into a narrow beam. also what kind of range does a typical magnetron have? i know it is a good idea to protect myself. would it be sufficient to take some screen and ground it out to serve as a 'faraday cage'? TY

Proud Mary

Tue Dec 22 2009, 04:09PM

Registered Member #543 Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992

Why do you want to harm other people?

lokeycmos

Tue Dec 22 2009, 04:19PM

Registered Member #2553 Joined: Fri Dec 18 2009, 01:36PM
Location: St Cloud Minnesota
Posts: 97

thats not funny, i have no intention to harm anyone. it strictly in the name of science. im into high voltage and im expanding to microwaves. nothing illegal

Hon1nbo

Tue Dec 22 2009, 05:19PM

Registered Member #902 Joined: Sun Jul 15 2007, 08:17PM
Location: Pacific Northwest USA
Posts: 1042

if you really want to get into microwaves, I suggest you do some serious research regarding antenna design and radiation patterns, the ARRL makes a good microwave transmitter book that has a lot on design of such transmitters, maybe it would be a good place for you to start
many book stores like borders or barnes and noble carry at least something from the ARRL, or if you find it on their website you could have it sent to the store

if you have a hard time finding it (and when I found mine, it had been sitting on a shelf for so long they dropped the price from $30 to $5) it may be out of print, I might be willing to part with mine as I don't do much in terms of microwaves

safety first, and while you say you care about it, and I do not doubt that you do, make sure you understand that there is more than just basics with microwaves as they can do a lot more damage!

-Jimmy

p.s: what experiments do you plan to perform with a focused beam?

Proud Mary

Tue Dec 22 2009, 05:24PM

Registered Member #543 Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992

lokeycmos wrote ...

thats not funny, i have no intention to harm anyone. it strictly in the name of science. im into high voltage and im expanding to microwaves. nothing illegal

I completely agree that there is nothing funny about directed energy weapons - as wikipedia amongst many other sources defines HERF.

lokeycmos

Tue Dec 22 2009, 05:45PM

Registered Member #2553 Joined: Fri Dec 18 2009, 01:36PM
Location: St Cloud Minnesota
Posts: 97

the reason i was looking for a beam is basically because i dont know what angle the waves are comming out of the magnetron. so with a beam i can rest assured(along with other safety measures) that the beams arent going everywhere. thats all. Im sure my fellow science and high voltage enthusiasts understand this type of stuff sets us apart from many others.

these are just some examples of things im interested in doing:

Hon1nbo

Tue Dec 22 2009, 07:14PM

Registered Member #902 Joined: Sun Jul 15 2007, 08:17PM
Location: Pacific Northwest USA
Posts: 1042

Proud Mary wrote ...

lokeycmos wrote ...

thats not funny, i have no intention to harm anyone. it strictly in the name of science. im into high voltage and im expanding to microwaves. nothing illegal

I completely agree that there is nothing funny about directed energy weapons - as wikipedia amongst many other sources defines HERF.

HERF is defined as High Energy Radio Frequency, it is not strictly used in a sense of weapons - that wikipedia article is about weapons which use herf, not about herf itself

as for the experiments linked to by the OP, it demonstrates that this is absolutely not a toy, but it is most certainly not a weapon unless special design considerations were used

I do not recommend such experiments to the inexperienced, but please do not be rash in classifying this as a weapon until you know more about how it is being used and how it is being constructed

@OP: from the experiments you linked to, I suggest you get a good foundation in Electro-Magnetic Theory before trying such experiments, and for the love of god do not try it in the fashion that the youtube videos show... that is just downright dangerous

you would need to consider shielding, grounding, exposure times, energy power, frequency of devices, antenna design - and since magnetrons can be dangerous, if you do not have experience with the above I suggest you wait

-Jimmy

Zum Beispiel

Tue Dec 22 2009, 07:16PM

Registered Member #514 Joined: Sun Feb 11 2007, 12:27AM
Location: Somewhere in Pirkanmaa, Finland
Posts: 295

lokeycmos wrote ...

these are just some examples of things im interested in doing:

1. Do you think these people thought doing these things was a good idea?
2. Do you think doing these things is a good idea?

If your answer is yes, then for the love of god don't do it. If no, then just don't do it. (Bit of a catch-22, ain't it?)

lokeycmos

Tue Dec 22 2009, 07:17PM

Registered Member #2553 Joined: Fri Dec 18 2009, 01:36PM
Location: St Cloud Minnesota
Posts: 97

i apologize if i gave the wrong impression by calling it a HERF. i just called it that because of what i gathered online.

Zeus

Wed Dec 23 2009, 12:09AM

Registered Member #2316 Joined: Tue Aug 25 2009, 03:04AM
Location: Bendigo, Australia
Posts: 107

I have been experimenting with HV for 2 years and hold an ham radio license. I would not touch anything with emits HERF with an ERP of 200 watts with a bargepole. Good luck.

1 2 next

Moderator(s): Chris Russell, Noelle, Alex, Tesladownunder, Dave Marshall, Dave Billington, Bjørn, Steve Conner, Wolfram, Kizmo, Mads Barnkob